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1.
Basically the whole Phoenix, Arizona area.
Phoenix, Tempe, Mesa, Scottsdale, Chandler, Glendale, and many more towns are in the "Valley of the Sun".
by Cody K August 08, 2005
 
2.
Phoenix, Arizona and metro area: Scottsdale, Mesa, Glendale, Tempe, etc.
The Valley of the Sun is the largest metro area in the Mountain Time Zone.
by Fellow Arizonan April 26, 2009